208 MOSSES AXD IIKI'ATK vE OF JETHOU. 



stretches of sandhills and sandy commons, which are entirely 

 wanting in Jethou and Sark. Yet everyone can see at a 

 glance that Herm and Jethon must have formed but one 

 island within comparatively recent geological times. A deep 

 valley lies between them, and the sea flows through it,— that is 

 all. At very low tides one coidd almost wade across the 

 channel ; indeed, a year or two ago one of the kangaroos 

 which are allowed to rnn wild in Herm, managed to get 

 across to Jethou, where it defied capture and lived a sort of 

 hermit life for a long time. 



Some day it will be worth while devoting a little time to 

 a critical study and analysis of the moss-flora of the Sarnian 

 Islands ; at present we may just notice one or two peculiarities 

 in the bryology of Jethou. 



The number of species found by me amounted to d5^ 

 consisting of 4:'J Mosses and 13 Hepatics. This is quite an 

 interesting variety for a tiny islet only half a mile long ; for 

 there are localities in England ten or even twenty times the 

 size, which do not produce so many. All these dd species are 

 recorded for Guernsey with one exception, Webcra Tozeri, a 

 little moss which has been found in Alderney, and is sure to 

 be detected in Guernsey some day. 



It is remarkable, however, that quite a number of species. 

 Mosses as well as Hepatics, occur in Jethou which are 

 apparently absent from its sister island. I worked Herm 

 pretty thoroughly two years ago, and therefore the discovery 

 in Jethou of no less than fourteen additional species caused 

 me considerable sui prise ; because most of these are not 

 plants which are likely to be overlooked by a moss-collector 

 of any experience, or mistaken for anything else in these 

 islands. 



In our Transactions for 1904, p. 371, a list is given of 

 the Mosses of Herm, comprising 63 s])ecies. The ten addi- 

 tional species found in Jethou are as follows : — 



Polytrichum aloides. Funaria ericetorum. 



Archidium alternifolium. Webera Tozeri. 



Barbula revoluta. Bryum alpinum. 



fallax. Hypnum squarrosum. 

 Orthotrichum affine. triquetrum. 



Only twelve Hepatica,' were discovered in Herm, whilst 

 thirteen were gathered in Jethou, of which four species are 

 additional, viz. : — 



Cephalozia bicuspidata. Diplophyllum albicans. 



Scapania compacta. Nardia Funckii. 



